Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f916ac9d042f0b5…

MALICIOUS

PDF

42.7 KB Created: 2018-12-15 08:10:57 +03:00 Authoring application: Adobe PageMaker 7.0 (via Acrobat Distiller 5.0.5 (Windows))
MD5: 6485732fd61a444c6f5413b7d1f68d37 SHA-1: 287d2d0590eee022337abcd131f25f5266b895ce SHA-256: 5f916ac9d042f0b5adac002f2e4f7131905a2fb9a73db5b2abe0e93992cad207
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links pointing to external PDF files, a technique often used for SEO manipulation or to distribute malicious content. The ML classifier also flagged this PDF as malicious. The primary attack pattern observed is the distribution of numerous links, likely intended to direct users to potentially harmful content hosted on www.gorillawalker.com.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8872

Heuristics 2

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://www.gorillawalker.com/cause-for-change-the-why-and-how-of-nonprofit-millennial.pdf
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    • http://www.gorillawalker.com/harper-s-magazine-june-1917-67th-anniversary.pdf
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    • http://www.gorillawalker.com/distributions-of-goodness-of-fit-statistics.pdf
    • http://www.gorillawalker.com/the-making-of-the-bahamas.pdf
    • http://www.gorillawalker.com/venice-its-story-architecture-and-art-half-title-the-kitbag.pdf
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    • http://www.gorillawalker.com/the-soil-its-nature-relations-and-fundamental-principles-of-management.pdf
    • http://www.gorillawalker.com/napoleon-y-maria-walewska-la-fiel-amante-del-emperador-grandes.pdf
    • http://www.gorillawalker.com/d-b-country-riskline-report-trinidad-tobago-download-pdf-digital.pdf
    • http://www.gorillawalker.com/marie-curie-scientists-of-the-world.pdf
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    • http://www.gorillawalker.com/the-autonomy-of-labour-law-kindle-edition.pdf
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    • http://www.gorillawalker.com/keyboard-voicings-the-complete-guide-essential-concepts.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://www.aiim.org/pdfa/ns/extension/
    • http://www.aiim.org/pdfa/ns/schema#
    • http://www.aiim.org/pdfa/ns/property#
    • http://www.aiim.org/pdfa/ns/id/

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